package csdn;

public class Digui {
	
	public int f(int n ){
		if(n ==1 || n == 2) {
			
			return 1;
		}else {
			
			return f(n-1) + f(n - 2);
		}
	}
	
	
	public static void main(String[] args){
		System.out.println(new Digui().f(10));
	}
}
